waelti and e



0. N. WAELTI AND E. F. ,CHESNEY.

AUTOMOBILE EXTRACTOR. APPLICATION FILED JUNE 11, 1917..

Patented Mar. 16, 1920.

2 SHEETS-SHEET I.

0. N. WAELTI AND E. F. CHESNEY.

AUTOMOBILE EXTHACTOR. APPLICATION FILED JUNE II, 1911'.

0 u u 2 w W21 M 6E 3%. am 06 d8 d Mg UNITED STATES PATENT OFFICE.

OTTO N. WAELTI AND EDWARD F. GHESNEY, 0F SEMANS, SASKATCHEWAN, CANADA.

AUTOMOBILE-EXTRAGTOR.

Application filed June 11, 1917.

To aZZ whom it may concern:

Be it known that we, OTTO N. VVAELTI and l lownno F. Crrnsnnx, bothcitizens of Can ada, residing at Semans, in the Province of Saskatchewanand Dominion of Canada, have invented a new and useful, Automobile-Extractor, of which the following is a speciiication.

This invention relates to motor vehicle crabs or devices adapted foremergency purposes for application to a motor vehicle to adapt saidvehicle by means of its own power to extricate itself from a mud hole orother difficult place when the driving wheels of the machine are unableto obtain "the necessary traction on the road surface for that purpose.1

An object of the present invention is to provide a simple, strong andreliable crab and cable which crab is adapted to be firmly secured toone of the driving wheels of the vehicle in an expeditious and easy way,

requiring no alteration or adjustment of any part of the motor vehicleitself. The device when detached from the driving wheel may be readilycarried in the tool box or one of the compartments of the machine.

With the above and other objects in view, the invention consists in thenovel construc tion, combination and arrangement of parts, as hereindescribed, illustrated and claimed.

In the accompanying drawings,

Figure 1 is a vertical section taken transversely through the hub of oneof the driving wheels of a motorv vehicle and the parts immediatelyadjacent thereto, showing the improved motor crab in its appliedrelation thereto.

Fig. 2 is an. outer face view of the crab.

Fig. 3 is an inner face view thereof.

Fig. 4 is a detail view of one of the anchors or stakes.

Fig. 5 is a diagrammatic plan view illustrating the method of using theapparatus.

The motor crab comprises a cable winding drum 1 of cylindrical formationand of suitable external diameter around which is wound a flexible cable2 which is used for extricating the motor vehicle from a mired orstalled position. The drum 1 has at its outer side a flange 3 whichprevents the cable 2 from working off the drum.

In connection with the drum 1, we employ a circular series of spiderarms 4 which also constitute guards to prevent the cable 2 Specificationof Letters Patent.

Patented Mar. 16, 1920.

Serial No. 174,160.

from working oil the drum 1. The arms "1-,

wardly extending portion 11 which is iusorted through a hole extendingtransversely through the drum 1, said portion 11 of the spider arm alsopassing through an abutment ring 12 whichbcars against the outer side ofthe drum, the outer end of the portion 11 of the spider arm beingthreaded to receive a clamping bolt 13. Each spider arm is also providedwith an inwardly cxtending portion 14: which passes between adjacentspokes and also pass through a wedge shaped spoke block 15 so that theportion -11: of each spider arm is maintained in a certain fixedrelation to the spokes of the wheel.

Arranged upon the inner side of the wheel aresemicircular clampingmembers 16 through which the portions 14: of each of the spider arms areinserted and secured by means of wrench nuts 17 or nuts having operatinghandles 18 to facilitate taking off and applying said nuts. Each of thesemi-circular clam pin members 16 has a cushion 19 of felt or likematerial, se cured to the inner face thereof to bear against thespokes 8and prevent marring the finish thereof. The spoke blocks 15 are notfastened directly to the wheel but are held in place between thesemi-circular clamping members 16 and the inclined spider arms 1-, thelatter in turn bearing against the outer hub plate 5 as shown in Fig. 1.

The way of using the apparatus is illus trated in Fig. 1 wherein it willbe observed that, in the preferred embodiment of the ill stored in acompartment or tool box of the motor vehicle. The arm 21 has a longtapering point adapting it to be driven into the road surface, while theother arm 22 is provided adjacent to the pointed extremity thereof withan inclinedoflset extension foot 24 which serves to limit thepenetration of the arm 22 into the road surface by resting on the roadsurface; This prevents the tilting of the anchor when stress is broughtto bear thereon by the cable 2. The rear. ends of'the cable 2 aresecurely fastened to and wrapped around the drums 1 on the rear drivingwheels. The opposite runs of the cable are then passed around pulleys 25secured to the extensions or feet 2 1 of the anchors. The medial portionof the cable 2 passes aroundanother pulley 26 having a hook 27 which,may be slipped over the front axle of the vehicle as shown in Fig. 5.

From the foregoing description taken in connection with the accompanyingdrawings,

it will now be seen that with the apparatus arranged as shown in Fig. 5,upon transmitting motion to the driving wheels of the vehicle, theopposite side portions of the cable 2 will be wound around said drumsthereby causing the vehicle to move toward the anchors 20. 7 Thus, thevehicle isenabled to extricate itself from a mired or difficult positionunder its own power; In bad seasons, when muddy roads may reasonably beexpectedto be encountered, the drums may be allowed to remain on thehubs .of the driving wheels. At other times, said drums may be easilyand quickly removed from the wheels and stored in the vehicle. The aboveadvantage of the invention resides in the ease and rapidity with whichthe device maybe applied to and removed from the driving wheel ofavehicle, only a few minutes being required for that operation. Thedevice is also compact and of sufiicient strength to withstand allstresses which may be imposed thereon.

We claim A motor vehicle crab, comprising a drum upon which a cable isadapted to be wound, a flange at the outer side of the body of the drum,said drum having a circular series of openings extending therethroughparallel to the axis of the drum, a circular series of inclined spiderarms having outer end portions inserted through the holes in the drumand also having inner end portions parallel. to the axis of the drum,intermediate portions of said arms being transversely ofiset to form theinner flange of the drum, a cushion member adapted to bear against theinner faces of the wheel spokes, clampingmembers adapted to bear againstsaid cushion member, and having holes to receive the inner end portionsof said spider arms, clamping nuts on the inner ends of said spiderarms, a wedge shaped block carried by each spider arm and adapted to fitbetween a pair of the spokes, an abutment ring bearing against the outerface of the drum and formed at points remote from the axis of the drumwith holes to receive the outer ends of said spider arms, and clampingnuts threaded on the outer ends of the spider arms and bearing againstsaid abutment ring.

In testimony whereof we aflix our signatures in presence of twowitnesses.

OTTO N. VVAELTI. EDWARD F. CHESNEY.

Witnesses:

. JNO. W. CALLUM,

M. MILLIKEN.

